In Switzerland, there was a young doctor named Jung. He always wanted to study the mysteries of the human mind.One day, he read a book by Dr. Freud, which stated that desire is the source of human behavior.Jung leaped up with excitement. "Wow! This professor has found a powerful theory to explain people!"

Jung immediately rushed to Vienna to meet Freud.The two talked from day to night for thirteen hours, neither wanting to sleep. Freud was delighted to discover that Jung was exceptionally intelligent and talented.Freud said happily, "Jung, you are like a son to me, my most ideal partner!"

Freud became Jung's teacher, teaching him his theories and even making him the president of his psychology association. Freud had high hopes for Jung. At a grand international conference, he proudly announced to everyone, "Look! This is my one and only heir. He will carry on and develop my theories!"

Jung became the center of attention, and everyone applauded him. After that, he worked even harder. But gradually, he began to feel that Freud's theory wasn't quite complete.

"Freud," Jung finally said excitedly during a discussion, "I've discovered that besides passion, other psychological energies, like our dreams and hopes for the future, also seem to deeply affect us and give us strength!" But when Freud heard this, the smile vanished from his face.

"No, Jung," Freud said, shaking his head sternly. "The things you're talking about are secondary, and they might even shake our very foundation." Jung was stunned. He never expected his exciting discovery would be met with such a cold warning.

Finally, Freud gave him an ultimatum. "Carl, you must either give up your new ideas and stick to our theory, or you must leave." Jung realized with pain that he had to make a choice between "loyalty" and "truth."

Finally, Jung chose the latter. He resigned as president of the association, which was a public declaration that their friendship was over. He sat alone in his study, feeling abandoned by the whole world. He had lost a teacher and a best friend.

The days after leaving Freud were incredibly difficult. Everyone called Jung a traitor, a madman. "Maybe I really was wrong," he asked himself over and over. In his deep self-doubt, he shut himself away and began to systematically organize and study his own ideas.

After several years of hard work, Jung finally established his own theoretical system. He introduced brand-new concepts like the "collective unconscious" and shared his teachings with the world, offering a completely new perspective for understanding human behavior, different from Freud's.

One day,Freud passed away. Jung received no letter. He just sat quietly in his study for a long time. He knew that the stubborn genius who had guided him at the start but later parted ways with him was gone forever.

Many years later, a young man came to the white-haired Jung with a question. "Professor, should I follow you, or should I follow Professor Freud?" Jung smiled and answered, "You don't need to follow anyone. Use our theories as tools and test them for yourself."

Jung continued, speaking to the young man, "Ultimately, you must find your own answer. Theories are lifeless, but people are alive. The most precious thing is that through learning and thinking, you become a more independent and complete person."

In that moment, Jung finally understood completely. Freud's harsh decision, though it had caused him great pain, had also given him the most precious gift of all: the chance to become himself.

Jung stood by the window. A free and vast wind blew across the lake. He thought of Freud, of their years filled with arguments but also priceless friendship, and finally, a smile of relief spread across his face.